62 lines
2.7 KiB
Markdown
62 lines
2.7 KiB
Markdown
# `bitcoin.conf` Configuration File
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The configuration file is used by `bitcoind`, `bitcoin-qt` and `bitcoin-cli`.
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All command-line options (except for `-?`, `-help`, `-version` and `-conf`) may be specified in a configuration file, and all configuration file options (except for `includeconf`) may also be specified on the command line. Command-line options override values set in the configuration file and configuration file options override values set in the GUI.
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## Configuration File Format
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The configuration file is a plain text file and consists of `option=value` entries, one per line. Leading and trailing whitespaces are removed.
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In contrast to the command-line usage:
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- an option must be specified without leading `-`;
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- a value of the given option is mandatory; e.g., `testnet=1` (for chain selection options), `noconnect=1` (for negated options).
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### Blank lines
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Blank lines are allowed and ignored by the parser.
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### Comments
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A comment starts with a number sign (`#`) and extends to the end of the line. All comments are ignored by the parser.
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Comments may appear in two ways:
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- on their own on an otherwise empty line (_preferable_);
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- after an `option=value` entry.
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### Network specific options
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Network specific options can be:
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- placed into sections with headers `[main]` (not `[mainnet]`), `[test]` (not `[testnet]`) or `[regtest]`;
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- prefixed with a chain name; e.g., `regtest.maxmempool=100`.
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Network specific options take precedence over non-network specific options.
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If multiple values for the same option are found with the same precedence, the
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first one is generally chosen.
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This means that given the following configuration, `regtest.rpcport` is set to `3000`:
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```
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regtest=1
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rpcport=2000
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regtest.rpcport=3000
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[regtest]
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rpcport=4000
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```
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## Configuration File Path
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The configuration file is not automatically created; you can create it using your favorite text editor. By default, the configuration file name is `bitcoin.conf` and it is located in the Bitcoin data directory, but both the Bitcoin data directory and the configuration file path may be changed using the `-datadir` and `-conf` command-line options.
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The `includeconf=<file>` option in the `bitcoin.conf` file can be used to include additional configuration files.
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### Default configuration file locations
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Operating System | Data Directory | Example Path
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-- | -- | --
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Windows | `%APPDATA%\Bitcoin\` | `C:\Users\username\AppData\Roaming\Bitcoin\bitcoin.conf`
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Linux | `$HOME/.bitcoin/` | `/home/username/.bitcoin/bitcoin.conf`
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macOS | `$HOME/Library/Application Support/Bitcoin/` | `/Users/username/Library/Application Support/Bitcoin/bitcoin.conf`
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You can find an example bitcoin.conf file in [share/examples/bitcoin.conf](../share/examples/bitcoin.conf).
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